Granted Patent
Utility
US 6,774,999 · App. 09/940,058
Apparatus and method for characterizing the toner concentration in a developer of a printing device
Inventors:
James J. Franzen, Paul A. Garsin, Edward W. Smith, Eric Michael Gross
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Aug 27, 2001
Inventors
James J. Franzen
Paul A. Garsin
Edward W. Smith
Eric Michael Gross
Assignee (at issue)
Xerox Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.